CD4017 IC Pinout, Features, Application & Datasheet

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The CD4017 is a widely used decade counter IC, popular for its simplicity and versatility in digital electronics. It operates as a Johnson counter, featuring 10 output pins (Q0–Q9) that sequentially activate in response to clock pulses. Designed with CMOS technology, it supports a wide voltage range (3V to 15V) and consumes minimal power, making it ideal for battery-operated devices.

Each clock pulse shifts the active output to the next pin, enabling applications like LED chasers, frequency dividers, and event counters. The IC also includes a "carry-out" pin, allowing cascading with other counters for higher counts. Its reset pin enables restarting the count at any point, offering flexibility in design.

The CD4017 is robust, reliable, and compatible with various logic families, making it a favorite among hobbyists and professionals alike. Its simplicity and low cost make it an excellent choice for learning and implementing sequential logic circuits.

Features of CD4017

1. 10 Decoded Outputs (Q0–Q9): Sequentially activates one output at a time with each clock pulse, ideal for creating time-delay circuits and LED chasers.
2. Clock Input: Accepts clock pulses to trigger the counting sequence.
3. Reset Pin: Allows resetting the count back to Q0, enabling flexibility in design.
4. Carry-Out Pin: Facilitates cascading multiple CD4017 ICs for extended counting sequences.
5. Wide Operating Voltage Range: Operates between 3V and 15V, compatible with a variety of digital and analog circuits.
6. Low Power Consumption: CMOS technology ensures minimal power usage, suitable for battery-powered devices.
7. High-Speed Operation: Handles clock frequencies up to 5 MHz, depending on supply voltage.
8. Noise Immunity: Designed for stable operation in noisy environments.
9. Compact Package: Available in DIP, SOIC, and other packages for easy integration.
10. Versatile Applications: Used in LED sequencing, frequency division, timers, counters, and other digital control systems.

Pinout of CD4017

1. OUT 0–OUT 9 (Pins 3, 2, 4, 7, 10, 1, 5, 6, 9, 11): The 10 outputs, activated sequentially with each clock pulse.
2. Vdd (Pin 16): Supply voltage pin (typically 3V–15V).
3. GND (Pin 8): Ground connection.
4. RESET (Pin 15): Resets the counter to its initial state (Q0 active).
5. CLOCK (Pin 14): Input for clock pulses to drive the counter.
6. ENABLE (Pin 13): Enables or disables the clock input (active low).
7. CLK/10 (Pin 12): Carry-out output that provides a pulse every 10 clock cycles, useful for cascading.

Download Datasheet

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Applications

1. LED Chasers and Sequencers
2. Frequency Divider
3. Digital Counters
4. Timing Circuits
5. Alarm and Security Systems
6. Light or Motor Controllers
7. Electronic Dice
8. Multiplexing
9. Game and Quiz Systems